A nurse is teaching a client who has chronic migraines about a new prescription for sumatriptan. Which of the following statements should the nurse include in the teaching?

"You should take a second dose if there is no relief within fifteen minutes after the initial dose."

"You may experience low blood pressure while taking this medication."

"You should have complete relief in six hours after taking this medication."

“You may experience muscle cramps as a potential adverse effect of the medication."